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In the sequence 10, 20, 30, …, 250, how many numbers are in the sequence?

hard MCQ 3 marks Class 2 · Mathematics · Counting in Tens
  1. 20
  2. 22
  3. 24
  4. 25
Answer
25

The correct answer is 25 — Add 1 for the first term: 24+1=25.

Step-by-step solution

  1. Compute difference between last and first: 250-10=240.
  2. Divide by step 10: 240/10=24.
  3. Add 1 for the first term: 24+1=25.
Common mistake: Forgetting to add 1 after division.

Concept tested: Counting terms in a tens sequence

Published · How this solution was prepared and checked

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